for the current search [pps].
:param maximum_transmit_rate: Maximum target transmit rate
for the current search [pps].
- :type result: NdrPdrResult
+ :type result: NdrPdrResult.NdrPdrResult
:type phases: int
:type duration: float
:type width_goal: float
def __init__(self, measurer, final_relative_width=0.005,
final_trial_duration=30.0, initial_trial_duration=1.0,
- number_of_intermediate_phases=2, timeout=600.0):
+ number_of_intermediate_phases=2, timeout=600.0, doublings=1):
"""Store the measurer object and additional arguments.
:param measurer: Rate provider to use by this search object.
to perform before the final phase [1].
:param timeout: The search will fail itself when not finished
before this overall time [s].
- :type measurer: AbstractMeasurer
+ :param doublings: How many doublings to do in external search step.
+ Default 1 is suitable for fairly stable tests,
+ less stable tests might get better overal duration with 2 or more.
+ :type measurer: AbstractMeasurer.AbstractMeasurer
:type final_relative_width: float
:type final_trial_duration: float
:type initial_trial_duration: int
:type number_of_intermediate_phases: int
:type timeout: float
+ :type doublings: int
"""
super(MultipleLossRatioSearch, self).__init__(measurer)
self.final_trial_duration = float(final_trial_duration)
self.number_of_intermediate_phases = int(number_of_intermediate_phases)
self.initial_trial_duration = float(initial_trial_duration)
self.timeout = float(timeout)
+ self.doublings = int(doublings)
@staticmethod
1.0 - MultipleLossRatioSearch.double_relative_width(
relative_width))
+ @staticmethod
+ def expand_down(relative_width, doublings, current_bound):
+ """Return rate of expanded logarithmic width below.
+
+ :param relative_width: The base relative width to double.
+ :param doublings: How many doublings to do for expansion.
+ :param current_bound: The current target transmit rate to move [pps].
+ :type relative_width: float
+ :type doublings: int
+ :type current_bound: float
+ :returns: Transmit rate smaller by logarithmically double width [pps].
+ :rtype: float
+ """
+ for _ in range(doublings):
+ relative_width = MultipleLossRatioSearch.double_relative_width(
+ relative_width)
+ return current_bound * (1.0 - relative_width)
+
@staticmethod
def double_step_up(relative_width, current_bound):
"""Return rate of double logarithmic width above.
1.0 - MultipleLossRatioSearch.double_relative_width(
relative_width))
+ @staticmethod
+ def expand_up(relative_width, doublings, current_bound):
+ """Return rate of expanded logarithmic width above.
+
+ :param relative_width: The base relative width to double.
+ :param doublings: How many doublings to do for expansion.
+ :param current_bound: The current target transmit rate to move [pps].
+ :type relative_width: float
+ :type doublings: int
+ :type current_bound: float
+ :returns: Transmit rate smaller by logarithmically double width [pps].
+ :rtype: float
+ """
+ for _ in range(doublings):
+ relative_width = MultipleLossRatioSearch.double_relative_width(
+ relative_width)
+ return current_bound / (1.0 - relative_width)
+
@staticmethod
def half_relative_width(relative_width):
"""Return relative width corresponding to half logarithmic width.
:type packet_loss_ratio: float
:returns: Structure containing narrowed down intervals
and their measurements.
- :rtype: NdrPdrResult
+ :rtype: NdrPdrResult.NdrPdrResult
:raises RuntimeError: If total duration is larger than timeout.
"""
minimum_transmit_rate = float(minimum_transmit_rate)
:param old_interval: The current interval before the measurement.
:param measurement: The new meaqsurement to take into account.
:param packet_loss_ratio: Fraction for PDR (or zero for NDR).
- :type old_interval: ReceiveRateInterval
- :type measurement: ReceiveRateMeasurement
+ :type old_interval: ReceiveRateInterval.ReceiveRateInterval
+ :type measurement: ReceiveRateMeasurement.ReceiveRateMeasurement
:type packet_loss_ratio: float
:returns: The updated interval.
- :rtype: ReceiveRateInterval
+ :rtype: ReceiveRateInterval.ReceiveRateInterval
"""
old_lo, old_hi = old_interval.measured_low, old_interval.measured_high
# Priority zero: direct replace if the target Tr is the same.
if ndr_lo.target_tr > state.minimum_transmit_rate:
new_tr = max(
state.minimum_transmit_rate,
- self.double_step_down(ndr_rel_width, ndr_lo.target_tr))
+ self.expand_down(
+ ndr_rel_width, self.doublings, ndr_lo.target_tr))
logging.info("ndr lo external %s", new_tr)
state = self._measure_and_update_state(state, new_tr)
continue
if pdr_lo.target_tr > state.minimum_transmit_rate:
new_tr = max(
state.minimum_transmit_rate,
- self.double_step_down(pdr_rel_width, pdr_lo.target_tr))
+ self.expand_down(
+ pdr_rel_width, self.doublings, pdr_lo.target_tr))
logging.info("pdr lo external %s", new_tr)
state = self._measure_and_update_state(state, new_tr)
continue
if ndr_hi.target_tr < state.maximum_transmit_rate:
new_tr = min(
state.maximum_transmit_rate,
- self.double_step_up(ndr_rel_width, ndr_hi.target_tr))
+ self.expand_up(
+ ndr_rel_width, self.doublings, ndr_hi.target_tr))
logging.info("ndr hi external %s", new_tr)
state = self._measure_and_update_state(state, new_tr)
continue
if pdr_hi.target_tr < state.maximum_transmit_rate:
new_tr = min(
state.maximum_transmit_rate,
- self.double_step_up(pdr_rel_width, pdr_hi.target_tr))
+ self.expand_up(
+ pdr_rel_width, self.doublings, pdr_hi.target_tr))
logging.info("pdr hi external %s", new_tr)
state = self._measure_and_update_state(state, new_tr)
continue
maximum_transmit_rate, packet_loss_ratio=0.005,
final_relative_width=0.005, final_trial_duration=30.0,
initial_trial_duration=1.0, number_of_intermediate_phases=2,
- timeout=720.0):
+ timeout=720.0, doublings=1):
"""Setup initialized TG, perform optimized search, return intervals.
:param frame_size: Frame size identifier or value [B].
to perform before the final phase [1].
:param timeout: The search will fail itself when not finished
before this overall time [s].
+ :param doublings: How many doublings to do in external search step.
+ Default 1 is suitable for fairly stable tests,
+ less stable tests might get better overal duration with 2 or more.
:type frame_size: str or int
:type traffic_type: str
:type minimum_transmit_rate: float
:type initial_trial_duration: float
:type number_of_intermediate_phases: int
:type timeout: float
+ :type doublings: int
:returns: Structure containing narrowed down NDR and PDR intervals
and their measurements.
:rtype: NdrPdrResult
measurer=tg_instance, final_trial_duration=final_trial_duration,
final_relative_width=final_relative_width,
number_of_intermediate_phases=number_of_intermediate_phases,
- initial_trial_duration=initial_trial_duration, timeout=timeout)
+ initial_trial_duration=initial_trial_duration, timeout=timeout,
+ doublings=doublings)
result = algorithm.narrow_down_ndr_and_pdr(
minimum_transmit_rate, maximum_transmit_rate, packet_loss_ratio)
return result
| | ... | - initial_trial_duration - Duration of initial trials [s]. Type: float
| | ... | - intermediate phases - Number of intermediate phases [1]. Type: int
| | ... | - timeout - Fail if search duration is longer [s]. Type: float
+| | ... | - doublings - How many doublings to do when expanding [1]. Type: int
| | ...
| | ... | *Example:*
| | ...
| | ... | \| Find NDR and PDR intervals using optimized search \| \${64} \| \
| | ... | 3-node-IPv4 \| \${100000} \| \${14880952} \| \${0.005} \| \${0.005} \
-| | ... | \| \${30.0} \| \${1.0} \| \${2} \| ${600.0} \|
+| | ... | \| \${30.0} \| \${1.0} \| \${2} \| ${600.0} \| ${2} \|
| | ...
| | [Arguments] | ${frame_size} | ${topology_type} | ${minimum_transmit_rate}
| | ... | ${maximum_transmit_rate} | ${packet_loss_ratio}=${0.005}
| | ... | ${final_relative_width}=${0.005} | ${final_trial_duration}=${30.0}
| | ... | ${initial_trial_duration}=${1.0}
| | ... | ${number_of_intermediate_phases}=${2} | ${timeout}=${720.0}
+| | ... | ${doublings}=${2}
| | ...
| | ${result} = | Perform optimized ndrpdr search | ${frame_size}
| | ... | ${topology_type} | ${minimum_transmit_rate*2}
| | ... | ${maximum_transmit_rate*2} | ${packet_loss_ratio}
| | ... | ${final_relative_width} | ${final_trial_duration}
| | ... | ${initial_trial_duration} | ${number_of_intermediate_phases}
-| | ... | timeout=${timeout}
+| | ... | timeout=${timeout} | doublings=${doublings}
| | Display result of NDRPDR search | ${result} | ${frame_size}
| | Check NDRPDR interval validity | ${result.pdr_interval}
| | ... | ${packet_loss_ratio}
Code Review / csit.git / commitdiff